1993-2023年太平洋岛屿国家海域海平面高度异常遥感监测数据集

该数据集包括1993-2023年太平洋岛屿国家海平面高度异常.nc数据及对应元数据表，文件命名采用《机构名称+“_”+项目名称+“_”+要素名称+“_”+期次+“_”+区域+“_”+空间分辨率+“_”+算法版本+矢量层/专题图》的方式。其中海平面高度异常.nc数据源自CMEMS全球尺度的SLA数据，通过经纬度裁切后，制作获得。数据采用等经纬度栅格保存，时间分辨率为月平均，空间分辨率为0.25°。元数据文件指记录.nc数据元数据信息的文件。
目前，海面高度异常数据（SLA）主要由卫星高度计观测获得，单颗卫星空间覆盖率有限。因此，本数据集在欧空局哥白尼海洋环境监测中心多源卫星融合SLA产品的基础上，抽取研究区域的海平面高度异常数据进行评估、分析。CMEMS的SLA数据由SL-TAC多任务高度计数据处理系统生产：其数据融合了国内外发射的多源高度计传感器（Sentinel-3A、Jason-3、HY-2A、Saral/AltiKa、Cryosat-2、OSTM/Jason-2、Jason-1、Topex/ Poseidon、Envisat、GFO、ERS-1/2），可提供较高的空间覆盖率。同时，融合数据经由不同传感器在全球的互交叉点和自交叉点差值的最小化处理，可显著消除轨道误差的影响。

This dataset includes sea level anomaly .nc data and corresponding metadata tables for Pacific island countries from 1993 to 2023. The naming convention of files follows the format: [Institution Name]_[Project Name]_[Element Name]_[Period]_[Region]_[Spatial Resolution]_[Algorithm Version]_[Vector Layer/Thematic Map]. The sea level anomaly .nc data is derived from the global-scale SLA data provided by CMEMS, and was obtained by cropping based on longitude and latitude coordinates. The data is stored in equal-latitude and longitude raster format, with a temporal resolution of monthly average and a spatial resolution of 0.25°. Metadata files refer to documents that record the metadata information of the .nc data. Currently, sea level anomaly (SLA) data is mainly obtained via satellite altimeter observations, while the spatial coverage of a single satellite is limited. Therefore, this dataset extracts, evaluates and analyzes the sea level anomaly data of the study area based on the multi-source satellite merged SLA products from the Copernicus Marine Environment Monitoring Service (CMEMS) of the European Space Agency (ESA). The SLA data from CMEMS is produced by the SL-TAC multi-mission altimeter data processing system: it fuses multi-source altimeter sensors launched worldwide, including Sentinel-3A, Jason-3, HY-2A, Saral/AltiKa, Cryosat-2, OSTM/Jason-2, Jason-1, Topex/Poseidon, Envisat, GFO, and ERS-1/2, thus providing relatively high spatial coverage. Meanwhile, the merged data undergoes minimization processing of cross-over and in-track differences from different sensors globally, which can significantly eliminate the impact of orbital errors.

搜集汇总

背景与挑战

背景概述

该数据集是1993年至2023年太平洋岛屿国家海域的海平面高度异常遥感监测数据，空间分辨率为0.25°，覆盖范围从122°E到117°W、28°N到48°S。数据基于多源卫星融合产品生成，融合了Sentinel-3A、Jason-3等多种卫星高度计传感器观测，旨在提供高空间覆盖并减少轨道误差，适用于海洋环境监测和研究。